1) Display the details of all employees
SQL>Select *
from emp;
2) Display the depart information from department
table
SQL>select *
from dept;
3) Display the name and job for all the employees
SQL>select
ename,job from emp;
4) Display the name and salary for all the employees
SQL>select
ename,sal from emp;
5) Display the employee no and totalsalary for all the employees
SQL>select
empno,ename,sal,comm, sal+nvl(comm,0) as"total salary" from
emp
6) Display the employee name and annual salary for
all employees.
SQL>select
ename, 12*(sal+nvl(comm,0)) as "annual Sal" from emp
7) Display the names of all the employees who are
working in depart number 10.
SQL>select
emame from emp where deptno=10;
8) Display the names of all the employees who are
working as clerks and
drawing a
salary more than 3000.
SQL>select ename
from emp where job='CLERK' and sal>3000;
9) Display the employee number and name who are earning comm.
SQL>select
empno,ename from emp where comm is not null;
10) Display the employee number and name who do not earn any comm.
SQL>select empno,ename from emp where comm is null;
11) Display the names of employees who are working
as clerks,salesman or
analyst and drawing a salary more than 3000.
SQL>select ename
from emp where job='CLERK' OR JOB='SALESMAN'
OR
JOB='ANALYST' AND SAL>3000;
12) Display the names of the employees who are
working in the company for
the past 5 years;
SQL>select ename
from emp where to_char(sysdate,'YYYY')-to_char(hiredate,'YYYY')>=5;
13) Display the list of employees who have joined
the company before
30-JUN-90 or after 31-DEC-90.
a) select ename from emp where hiredate < '30-JUN-1990'
or hiredate >
'31-DEC-90';
14) Display current Date.
SQL>select sysdate from dual;
15) Display the list of all users in your
database(use catalog table).
SQL>select username from all_users;
16) Display the names of all tables from current
user;
SQL>select tname from tab;
17) Display the name of the current user.
SQL>show user
18) Display the names of employees working in
depart number 10 or 20 or 40
or employees working as CLERKS, SALESMAN or
ANALYST.
SQL>select ename from emp where deptno in(10,20,40) or
job
in('CLERKS','SALESMAN','ANALYST');
19) Display the names of employees whose name
starts with alaphabet S.
SQL>select ename from emp where ename like 'S%';
20) Display the Employee names for employees whose
name ends with alaphabet S.
SQL>select ename from emp where ename like '%S';
21) Display the names of employees whose names
have second alphabet A in
their names.
SQL>select ename from emp where ename like '_A%';
22) select the names of the employee whose names
is exactly five characters
in length.
SQL>select ename from emp where length(ename)=5;
23) Display the names of the employee who are not
working as MANAGERS.
SQL>select ename from emp where job not in('MANAGER');
24) Display the names of the employee who are not
working as SALESMAN OR
CLERK OR ANALYST.
SQL>select ename from emp where job not
in('SALESMAN','CLERK','ANALYST');
25) Display all rows from emp table.The system
should wait after every
screen full of informaction.
SQL>set pause on
26) Display the total number of employee working
in the company.
SQL>select count(*) from emp;
27) Display the total salary beiging paid to all
employees.
SQL>select sum(sal) from emp;
28) Display the maximum salary from emp table.
SQL>select max(sal) from emp;
29) Display the minimum salary from emp table.
SQL>select min(sal) from emp;
30) Display the average salary from emp table.
SQL>select avg(sal) from emp;
31) Display the maximum salary being paid to
CLERK.
SQL>select max(sal) from emp where job='CLERK';
32) Display the maximum salary being paid to
depart number 20.
SQL>select max(sal) from emp where deptno=20;
33) Display the minimum salary being paid to any
SALESMAN.
SQL>select min(sal) from emp where job='SALESMAN';
34) Display the average salary drawn by MANAGERS.
SQL>select avg(sal) from emp where job='MANAGER';
35) Display the total salary drawn by ANALYST
working in depart number 40.
SQL>select sum(sal) from emp where job='ANALYST' and
deptno=40;
36) Display the names of the employee in order of
salary i.e the name of
the employee earning lowest salary should salary appear first.
SQL>select ename from emp order by sal;
37) Display the names of the employee in
descending order of salary.
a)select ename from emp order by sal desc;
38) Display the names of the employee in order of
employee name.
a)select ename from emp order by ename;
39) Display empno,ename,deptno,sal sort the output
first base on name and
within name by deptno and with in deptno by sal.
SQL>select empno,ename,deptno,sal from emp order by ename,deptno,sal
40) Display the name of the employee along with
their annual salary(sal*12).The name of the employee earning highest annual
salary should apper first.
SQL>select ename,sal*12 from emp order by sal desc;
41) Display name,salary,hra,pf,da,total salary for
each employee. The
output should be in the order of total salary,hra
15% of salary,da 10% of salary,pf 5%
salary,total salary will be(salary+hra+da)-pf.
SQL>select ename,sal,sal/100*15 as hra,sal/100*5 as
pf,sal/100*10 as
da, sal+sal/100*15+sal/100*10-sal/100*5 as total from emp;
42) Display depart numbers and total number of
employees working in each
department.
SQL>select deptno,count(deptno)from emp group by deptno;
43) Display the various jobs and total number of
employees within each job
group.
SQL>select job,count(job)from emp group by job;
44) Display the depart numbers and total salary
for each department.
SQL>select deptno,sum(sal) from emp group by deptno;
45) Display the depart numbers and max salary for
each department.
SQL>select deptno,max(sal) from emp group by deptno;
46) Display the various jobs and total salary for
each job
SQL>select job,sum(sal) from emp group by job;
48) Display the depart numbers with more than
three employees in each dept.
SQL>select deptno,count(deptno) from emp group by deptno
having
count(*)>3;
49) Display the various jobs along with total
salary for each of the jobs
where total salary is greater than 40000.
SQL>select job,sum(sal) from emp group by job having
sum(sal)>40000;
50) Display the various jobs along with total
number of employees in each
job.The output should contain only those jobs with more than three employees.
SQL>select job,count(empno) from emp group by job having
count(job)>3
51) Display the name of the empployee who earns
highest salary.
SQL>select ename from emp where sal=(select max(sal) from
emp);
52) Display the employee number and name for
employee working as clerk and
earning highest salary among clerks.
SQL>select empno,ename from emp where where job='CLERK'
and
sal=(select max(sal) from emp where
job='CLERK');
53) Display the names of salesman who earns a
salary more than the highest
salary of any clerk.
SQL>select ename,sal from emp where job='SALESMAN' and
sal>(select
max(sal) from emp
where job='CLERK');
54) Display the names of clerks who earn a salary
more than the lowest
salary of any salesman.
SQL>select ename from emp where job='CLERK' and
sal>(select min(sal)
from emp where job='SALESMAN');
Display the names of employees who earn a salary
more than that of
Jones or that of salary grether than that of scott.
SQL>select ename,sal from emp where sal>
(select sal from emp where ename='JONES')and sal> (select
sal from emp
where ename='SCOTT');
55) Display the names of the employees who earn
highest salary in their
respective departments.
SQL>select ename,sal,deptno from emp where sal in(select
max(sal) from
emp group by deptno);
56) Display the names of the employees who earn
highest salaries in their
respective job groups.
SQL>select ename,sal,job from emp where sal in(select
max(sal) from emp
group by job)
57) Display the employee names who are working in
accounting department.
SQL>select ename from emp where deptno=(select deptno
from dept where
dname='ACCOUNTING')
58) Display the employee names who are working in
Chicago.
SQL>select ename from emp where deptno=(select deptno
from dept where
LOC='CHICAGO
59) Display the Job groups having total salary
greater than the maximum
salary for managers.
SQL>SELECT JOB,SUM(SAL) FROM EMP GROUP BY JOB HAVING
SUM(SAL)>(SELECT
MAX(SAL) FROM EMP WHERE JOB='MANAGER');
60) Display the names of employees from department
number 10 with salary
grether than that of any employee working in other
department.
SQL>select ename from emp where deptno=10 and
sal>any(select sal from
emp where deptno not in 10).
61) Display the names of the employees from
department number 10 with
salary greater than that of all employee working
in other departments.
SQL>select ename from emp where deptno=10 and
sal>all(select sal from
emp where deptno not in 10).
62) Display the names of the employees in
Uppercase.
SQL>select upper(ename)from emp
63) Display the names of the employees in
Lowecase.
SQL>select lower(ename)from emp
64) Display the names of the employees in
Propercase.
SQL>select initcap(ename)from emp;
65) Display the length of Your name using
appropriate function.
SQL>select length('name') from dual
66) Display the length of all the employee names.
SQL>select length(ename) from emp;
67) select name of the employee concatenate with
employee number.
SQL>select ename||empno from emp;
68) User appropriate function and extract 3
characters starting from 2
characters from the following string 'Oracle'. i.e the out put should be
'ac'.
SQL>select substr('oracle',3,2) from dual
69) Find the First occurance of character 'a' from
the following string i.e
'Computer Maintenance Corporation'.
SQL>SELECT INSTR('Computer Maintenance
Corporation','a',1) FROM DUAL
70) Replace every occurance of alphabhet A with B
in the string Allens (use
translate function)
SQL>select translate('Allens','A','B') from dual
71) Display the informaction from emp table.Where
job manager is found it
should be displayed as boos(Use replace function).
SQL>select replace(JOB,'MANAGER','BOSS') FROM EMP;
72) Display empno,ename,deptno from emp
table.Instead of display department
SQL>select empno,ename,decode(deptno,10,'ACCOUNTING',20,'RESEARCH',30,'SALES',40,'OPRATIONS')
from emp;
73) Display your age in days.
SQL>select to_date(sysdate)-to_date('10-sep-77')from dual
74) Display your age in months.
SQL>select months_between(sysdate,'10-sep-77') from dual
75) Display the current date as 15th Augest Friday
Nineteen Ninety Saven.
SQL>select to_char(sysdate,'ddth Month day year') from
dual
76) Display the following output for each row from
emp table.
scott has joined the company on wednesday 13th
August ninten nintey.
SQL>select ENAME||' HAS JOINED THE COMPANY ON '||to_char(HIREDATE,'day
ddth Month
year') from EMP;
77) Find the date for nearest saturday after
current date.
SQL>SELECT NEXT_DAY(SYSDATE,'SATURDAY')FROM DUAL;
78) Display current time.
SQL>select to_char(sysdate,'hh:MM:ss') from dual.
79) Display the date three months Before the
current date.
SQL>select add_months(sysdate,3) from dual;
80) Display the common jobs from department number
10 and 20.
SQL>select job from emp where deptno=10 and job in(select
job from emp
where deptno=20);
81) Display the jobs found in department 10 and 20
Eliminate duplicate jobs.
SQL>select distinct(job) from emp where deptno=10 or
deptno=20
(or)
SQL>select distinct(job) from emp where deptno in(10,20);
82) Display the jobs which are unique to
department 10.
SQL>select distinct(job) from emp where deptno=10
83) Display the details of those who do not have
any person working under them.
SQL>select e.ename from emp,emp e where emp.mgr=e.empno
group by
e.ename having count(*)=1;
84) Display the details of those employees who are
in sales department and
grade is 3.
SQL>select * from emp where deptno=(select deptno from
dept where
dname='SALES')and sal between(select losal from salgrade
where grade=3)and
(select
hisal from salgrade where grade=3);
85) Display those who are not managers and who are
managers any one.
i)display the managers names
SQL>select distinct(m.ename) from emp e,emp m where
m.empno=e.mgr;
ii)display the who are not managers
SQL>select ename from emp where ename not in(select
distinct(m.ename)
from emp
e,emp m where m.empno=e.mgr);
86) Display those employee whose name contains not
less than 4 characters.
SQL>select ename from emp where length(ename)>4;
87) Display those department whose name start with
"S" while the location
name ends with "K".
SQL>select dname from dept where dname like 'S%' and loc
like '%K';
88) Display those employees whose manager name is
JONES.
SQL>select p.ename from emp e,emp p where e.empno=p.mgr
and
e.ename='JONES';
89) Display those employees whose salary is more
than 3000 after giving 20%
increment.
SQL>select ename,sal from emp where (sal+sal*.2)>3000;
90) Display all employees while their dept names;
SQL>select ename,dname from emp,dept where
emp.deptno=dept.deptno
91) Display ename who are working in sales dept.
SQL>select ename from emp where deptno=(select deptno
from dept where
dname='SALES');
92) Display employee name,deptname,salary and comm
for those sal in between
2000 to 5000 while location is chicago.
SQL>select ename,dname,sal,comm from emp,dept where
sal between 2000
and 5000
and loc='CHICAGO
93) Display those employees whose salary greter
than his manager salary.
SQL>select p.ename from
emp e,emp p where e.empno=p.mgr and p.sal>e.sal
94) Display those employees who are working in the
same dept where his
manager is work.
SQL>select p.ename from
emp e,emp p where e.empno=p.mgr and
p.deptno=e.deptno;
95) Display those employees who are not working
under any manager.
SQL>select ename from
emp where mgr is null
96) Display grade and employees name for the dept
no 10 or 30 but grade is
not 4 while joined the company before 31-dec-82.
SQL>select ename,grade from emp,salgrade where sal
between losal and
hisal and deptno in(10,30) and grade<>4 and
hiredate<'31-DEC-82';
97) Update the salary of each employee by 10%
increment that are not
Eligiblw for commission.
SQL>update emp set sal=sal+sal*10/100 where comm is null;
98) SELECT that employee who joined the company
before 31-dec-82 while
Their dept location is newyork or Chicago.
SQL> SELECT EMPNO, ENAME, HIREDATE, DNAME, LOC FROM EMP,
DEPT
WHERE
(EMP.DEPTNO=DEPT.DEPTNO) AND
HIREDATE <'31-DEC-82' AND DEPT.LOC IN ('CHICAGO','NEW
YORK');
99) DISPLAY EMPLOYEE NAME, JOB, DEPARTMENT,
LOCATION FOR ALL WHO ARE WORKING
AS MANAGER?
SQL>select ename, JOB, DNAME, LOCATION from EMP, DEPT
where mgr is not
Null;
100) DISPLAY THOSE EMPLOYEES WHOSE MANAGER NAME IS
JONES? --
[AND ALSO DISPLAY THEIR MANAGER NAME]?
SQL> SELECT P.ENAME FROM EMP E, EMP P WHERE E.EMPNO=P.MGR
AND
E.ENAME='JONES';
101) Display name and salary of ford if his salary
is equal to hisal of his
Grade
a) Select ename, sal,
grade from EMP, salgrade where sal between losal and
hisal and ename ='FORD' AND HISAL=SAL;
102) Display employee name, job, depart name,
manager name, his grade and make
out an under department wise?
SQL>SELECT E.ENAME, E.JOB, DNAME, EMP.ENAME, GRADE FROM
EMP,EMP
E, SALGRADE, DEPT
WHERE EMP.SAL BETWEEN LOSAL AND HISAL AND EMP.EMPNO=E.MGR
AND
EMP.DEPTNO=DEPT.DEPTNO ORDER BY DNAME
103) List out all employees name,job,salary,grade
and depart name for every
one in the company except 'CLERK'.Sort on salary display the
highest salary?
SQL>SELECT ENAME,JOB,DNAME,SAL,GRADE FROM
EMP,SALGRADE,DEPT WHERE
SAL BETWEEN LOSAL AND HISAL AND EMP.DEPTNO=DEPT.DEPTNO AND
JOB
NOT IN('CLERK')ORDER
BY SAL ASC;
104) Display the employee name,job and his
manager.Display also employee who
are without manager?
SQL>select e.ename,e.job,eMP.ename AS Manager from
emp,emp e where
emp.empno(+)=e.mgr
105) Find out the top 5 earners of company?
SQL>SELECT DISTINCT SAL FROM EMP E WHERE 5>=(SELECT
COUNT(DISTINCT SAL)
FROM
EMP A WHERE
A.SAL>=E.SAL)ORDER BY SAL DESC;
106) Display name of those employee who are
getting the highest salary?
SQL>select ename from emp where sal=(select max(sal) from
emp);
107) Display those employee whose salary is equal
to average of maximum and
minimum?
SQL>select ename from emp where sal=(select
max(sal)+min(sal)/2 from
emp);
108) Select count of employee in each
department where count greater than 3?
SQL>select count(*) from emp group by deptno having
count(deptno)>3
109) Display dname where at least 3 are working
and display only department
name?
SQL>select distinct d.dname from dept d,emp e where
d.deptno=e.deptno
and 3>any
(select
count(deptno) from emp group by deptno)
110) Display name of those managers name whose
salary is more than average
salary of his company?
SQL>SELECT E.ENAME,EMP.ENAME FROM EMP,EMP E
WHERE
EMP.EMPNO=E.MGR AND E.SAL>(SELECT AVG(SAL) FROM EMP);
111)Display those managers name whose salary is
more than average salary of
his employee?
SQL>SELECT DISTINCT EMP.ENAME FROM EMP,EMP E WHERE
E.SAL
<(SELECT AVG(EMP.SAL) FROM EMP
WHERE EMP.EMPNO=E.MGR
GROUP BY EMP.ENAME) AND
EMP.EMPNO=E.MGR;
112) Display employee name,sal,comm and net pay
for those employee
whose net pay is greter than or equal to any other
employee salary of
the company?
SQL>select ename,sal,comm,sal+nvl(comm,0) as NetPay from
emp
where
sal+nvl(comm,0) >any (select sal from emp)
113) Display all employees names with total sal of
company with each
employee name?
SQL>SELECT ENAME,(SELECT SUM(SAL) FROM EMP) FROM EMP;
114) Find out last 5(least)earners of the
company.?
SQL>SELECT DISTINCT SAL FROM EMP E WHERE
5>=(SELECT COUNT(DISTINCT SAL) FROM EMP A WHERE
A.SAL<=E.SAL)
ORDER BY
SAL DESC;
115) Find out the number of employees whose salary
is greater than their
manager salary?
SQL>SELECT E.ENAME FROM EMP ,EMP E WHERE EMP.EMPNO=E.MGR
AND
EMP.SAL
116) Display those department where no employee
working?
SQL>select dname from emp,dept where emp.deptno not
in(emp.deptno)
117) Display those employee whose salary is ODD
value?
SQL>select * from emp where sal<0 o:p="">
118) Display those employee whose salary contains
alleast 3 digits?
SQL>select * from emp where length(sal)>=3;
119) Display those employee who joined in the
company in the month of Dec?
SQL>select ename from emp where
to_char(hiredate,'MON')='DEC';
120) Display those employees whose name contains
"A"?
SQL>select ename from emp where instr(ename,'A')>0;
or
SQL>select ename from emp where ename like('%A%');
121) Display those employee whose deptno is
available in salary?
SQL>select emp.ename from emp, emp e where
emp.sal=e.deptno;
122) Display those employee whose first 2
characters from hiredate -last 2
characters of salary?
SQL>select
ename,SUBSTR(hiredate,1,2)||ENAME||substr(sal,-2,2) from emp
123) Display those employee whose 10% of salary is
equal to the year of
joining?
SQL>select ename from emp where
to_char(hiredate,'YY')=sal*0.1;
124) Display those employee who are working in
sales or research?
SQL>SELECT ENAME FROM EMP WHERE DEPTNO IN(SELECT DEPTNO
FROM DEPT WHERE
DNAME
IN('SALES','RESEARCH'));
125) Display the grade of jones?
SQL>SELECT ENAME,GRADE FROM EMP,SALGRADE
WHERE SAL
BETWEEN LOSAL AND HISAL AND Ename='JONES';
126) Display those employees who joined the
company before 15 of the month?
a)select ename from emp where to_char(hiredate,'DD')<15 o:p="">
127) Display those employee who has joined before
15th of the month.
a)select ename from emp where to_char(hiredate,'DD')<15 o:p="">
128) Delete those records where no of employees in
a particular department
is less than 3.
SQL>delete from emp where deptno=(select deptno from emp
group by
deptno having count(deptno)<3 o:p="">
129) Display the name of the department where no
employee working.
SQL> SELECT E.ENAME,E.JOB,M.ENAME,M.JOB FROM EMP E,EMP M
WHERE E.MGR=M.EMPNO
130) Display those employees who are working as
manager.
SQL>SELECT M.ENAME MANAGER FROM EMP M ,EMP E
WHERE E.MGR=M.EMPNO GROUP BY M.ENAME
131) Display those employees whose grade is equal
to any number of sal but
not equal to first number of sal?
SQL> SELECT ENAME,GRADE FROM EMP,SALGRADE
WHERE
GRADE NOT IN(SELECT SUBSTR(SAL,0,1)FROM EMP)
132) Print the details of all the employees who
are Sub-ordinate to BLAKE?
SQL>select emp.ename from emp, emp e where emp.mgr=e.empno
and
e.ename='BLAKE';
133) Display employee name and his salary whose
salary is greater than
highest
average of department number?
SQL>SELECT SAL FROM EMP WHERE SAL>(SELECT
MAX(AVG(SAL)) FROM EMP
GROUP BY
DEPTNO);
134) Display the 10th record of emp table (without
using rowid)
SQL>SELECT * FROM EMP WHERE ROWNUM<11 o:p="">
MINUS
SELECT *
FROM EMP WHERE ROWNUM<10 o:p="">
135) Display the half of the ename's in upper case
and remaining lowercase?
SQL>SELECT
SUBSTR(LOWER(ENAME),1,3)||SUBSTR(UPPER(ENAME),3,LENGTH(ENAME))
FROM EMP;
136) Display the 10th record of emp table without
using group by and rowid?
SQL>SELECT * FROM EMP WHERE ROWNUM<11 o:p="">
MINUS
SELECT *
FROM EMP WHERE ROWNUM<10 o:p="">
Delete the 10th record of emp table.
SQL>DELETE FROM EMP WHERE EMPNO=(SELECT EMPNO FROM EMP
WHERE ROWNUM<11 o:p="">
MINUS
SELECT
EMPNO FROM EMP WHERE ROWNUM<10 o:p="">
137) Create a copy of emp table;
SQL>create table new_table as select * from emp where
1=2;
138) Select ename if ename exists more than once.
SQL>select ename
from emp e group by ename having count(*)>1;
139) Display all enames in reverse
order?(SMITH:HTIMS).
SQL>SELECT REVERSE(ENAME)FROM EMP;
140) Display those employee whose joining of month
and grade is equal.
SQL>SELECT ENAME FROM EMP WHERE SAL BETWEEN
(SELECT
LOSAL FROM SALGRADE WHERE
GRADE=TO_CHAR(HIREDATE,'MM')) AND
(SELECT HISAL
FROM SALGRADE WHERE
GRADE=TO_CHAR(HIREDATE,'MM'));
141) Display those employee whose joining DATE is
available in deptno.
SQL>SELECT ENAME FROM EMP WHERE
TO_CHAR(HIREDATE,'DD')=DEPTNO
142) Display those employees name as follows
A ALLEN
B BLAKE
SQL> SELECT SUBSTR(ENAME,1,1),ENAME FROM EMP;
143) List out the employees ename,sal,PF(20% OF
SAL) from emp;
SQL>SELECT ENAME,SAL,SAL*.2 AS PF FROM EMP;
144) Create table emp with only one column empno;
SQL>Create table emp as select empno from emp where 1=2;
145) Add this column to emp table ename
vrachar2(20).
SQL>alter table emp add(ename varchar2(20));
146) Oops I forgot give the primary key
constraint. Add in now.
SQL>alter table emp add primary key(empno);
147) Now increase the length of ename column to 30
characters.
SQL>alter table emp modify(ename varchar2(30));
148) Add salary column to emp table.
SQL>alter table emp add(sal number(10));
149) I want to give a validation saying that
salary cannot be greater 10,000
(note give a name to this constraint)
SQL>alter table emp add constraint chk_001
check(sal<=10000)
150) For the time being I have decided that I will
not impose this validation.My boss has agreed to pay more than 10,000.
SQL>again alter the table or drop constraint with alter table emp drop constraint chk_001
(or)Disable the constraint by using alter
table emp modify constraint chk_001 disable;
151) My boss has changed his mind. Now he doesn't want to pay more than
10,000.so revoke that salary constraint.
SQL>alter table emp modify constraint chk_001 enable;
152) Add column called as mgr to your emp table;
SQL>alter table emp add(mgr number(5));
153) Oh! This column should be related to
empno. Give a command to add this
constraint.
SQL>ALTER TABLE EMP ADD CONSTRAINT MGR_DEPT FOREIGN
KEY(MGR) REFERENCES
EMP(EMPNO)
154) Add deptno column to your emp table;
SQL>alter table emp add(deptno number(5));
155) This deptno column should be related to
deptno column of dept table;
SQL>alter table emp add constraint dept_001 foreign
key(deptno)
reference dept(deptno)
[deptno
should be primary key]
156) Give the command to add the constraint.
SQL>alter table
157) Create table called as newemp. Using single command create this table
as well as get data into this table(use create
table as);
SQL>create table newemp as select * from emp;
Create table called as newemp. This table should contain only
empno,ename,dname.
SQL>create table newemp as select empno,ename,dname from
emp,dept where
1=2;
158) Delete the rows of employees who are working
in the company for more
than 2 years.
SQL>delete from emp where (sysdate-hiredate)/365>2;
159) Provide a commission(10% Comm Of Sal) to
employees who are not earning
any commission.
SQL>select sal*0.1 from emp where comm is null
160) If any employee has commission his commission
should be incremented by
10% of his salary.
SQL>update emp set comm=sal*.1 where comm is not null;
161) Display employee name and department name for
each employee.
SQL>select empno,dname from emp,dept where
emp.deptno=dept.deptno
162)Display employee number,name and location of
the department in which he
is working.
SQL>select empno,ename,loc,dname from emp,dept where
emp.deptno=dept.deptno;
163) Display ename,dname even if there are no
employees working in a
particular department(use outer join).
SQL>select ename,dname from emp,dept where
emp.deptno=dept.deptno(+)
164) Display employee name and his manager name.
SQL>select p.ename,e.ename from emp e,emp p where
e.empno=p.mgr;
165) Display the department name and total number
of employees in each
department.
SQL>select dname,count(ename) from emp,dept where
emp.deptno=dept.deptno group by dname;
166)Display the department name along with total
salary in each department.
SQL>select dname,sum(sal) from emp,dept where emp.deptno=dept.deptno
group by dname;
167) Display itemname and total sales amount for
each item.
SQL>select itemname,sum(amount) from item group by
itemname;
168) Write a Query To Delete The Repeted Rows from
emp table;
SQL>Delete from emp where rowid not in(select
min(rowid)from emp group
by ename)
169) TO DISPLAY 5 TO 7 ROWS FROM A TABLE
SQL>select ename from emp
where rowid
in(select rowid from emp where rownum<=7
minus
select rowid from
empi where rownum<5 o:p="">
170) DISPLAY
TOP N ROWS FROM TABLE?
SQL>SELECT * FROM
(SELECT
* FROM EMP ORDER BY ENAME DESC)
WHERE ROWNUM <10 o:p="">
171) DISPLAY
TOP 3 SALARIES FROM EMP;
SQL>SELECT SAL FROM ( SELECT * FROM EMP ORDER BY SAL DESC )
WHERE ROWNUM <4 o:p="">
172) DISPLAY
9th FROM THE EMP TABLE?
SQL>SELECT ENAME FROM EMP
WHERE ROWID=(SELECT ROWID FROM EMP
WHERE ROWNUM<=10
MINUS
SELECT ROWID FROM EMP WHERE ROWNUM
<10 o:p="">
select
second max salary from emp;
select
max(sal) fromemp where sal<(select
max(sal) from emp);
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